Crossword Genius

Type of pastry top for feast? Answer by organiser (7)

Ross

I believe the answer is:

filofax

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'organiser' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'type of pastry top for feast? answer by' is the wordplay.
'type of pastry' becomes 'filo' (I've seen this before).
'top for' suggests taking the first letters.
'by' becomes 'x' (multiplication sign).
The first letters of 'feast answer' is 'fa'.
'filo'+'fa'+'x'='FILOFAX'

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I've seen this clue in The Telegraph.
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